Str Number Coercible

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

namespace HH;

function str_number_coercible(
  string $str,
): bool;

Parameters

• string $str - The input string

Returns

• bool - - If $str is "numeric" such that (int)$str would yield either non-zero or 0 for a reason other than that the string didn't look numeric enough